Improvement in swages foe saw-teeth



'M//Nalohnson Swggefer/Sw Tee/b.

PATENTED' JAN 14 i869 @uiten faire gutem ffirr.

lIMPROVEMENT IN SWAGES FOB. SAW-TESTE.

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TOA ALL WHOM I'l MAY CONCERN:

Beit known that I, NELSON JOHNSON, of Jasper, in the county of Steuben,and State of New York, have invented a new and useful Swage forSaw-Teeth; and I do hereby declare the following to be a full, clear,and

enact description of the same, reference being had to the accompanyingdrawings, which are made a. part of p this specification.

This invention relates to setting or spreading the ends of saw-teeth,and consists, first, in the provision, o n the swage-stock, of notchesor teeth, which operate in conjunction with similar notches orserrations on the shank-of the saw-tooth, to hold the latter to theswage-stock `and prevent it from being driven off of thesupporting-dieby'the action oi` the hammer upon the stamping,striking-die; second, in the provision of means for adjusting thesupporting-die, or equivalent means `for adjusting the bearing-point ofthe saw-tooth on the swage-stock, in order to adapt the swage to actwith equal eiciency upon different teeth, or, in other words, toaccommodatethefswa'ge to such irregularities or variations vin the teethas are produced by filing and gnmming; third, in the'provision of areversible supporting-die, having a convex or oval face capable oi"drawing out the point of the tooth endways or spreading the samesideways; fourth, in the provision of a spring-holder for the stampingorstriking-die, the latter being thereby constantly held to its work.

Figure l is a perspective view of a swage illustrating my invention.

Figure 2 embraces two views of the dies, the lines-ot' vision of thedifferent views being'at right angles'to each other` Figure 3 is aperspective view of amodiiied form ofmy improved swage.

Similar letters of reference indicate correspondingparts in thevdierentgures.

In the drawings, A represents a .sewage-stock, and the die or pin uponwhich reststhe cutting-point'of the saw-tooth when under the action ofthe stamping or striking-die C. `The saw-tooth (which is indicated inred lines in fig. 1) is set between the pins D D' and E E, whereby it isheld against lateral displacement when acted' upon by the striking-dieC. If preferred, the saw-tooth maybe held against lateral movement bybeing set 1n suitable grooves 1n the swage-stock, lnstead or between thepms. The socket or aperture 1n the swagestock in which the swage-pin o'rdie -B is placed, communicates with the rectangular opening F, whichreceives a wedge, G, which serves'to support said swage-pin. Theposition of the wedge G is regulated by means of a set-screw, H, s6 asto raise or lower the swage-pin and support the same in the requiredposition to sustain the point of the saw-tooth. This adjustment of theswage-pin in relation to the front of the stock A, which serves as abearing for the shank of the tooth under treatment, enables the swage tobe applied with equal effect to diierent teeth, and to accommodateitself to suchrregularities ns are produced by ling and gumming. Ifdesired, a stationary die, B, may b e employed, and the edge of thesaw-tooth supported by a wedge, G, adjust able by a set-screw, H, withina dove-tailed opening, as shown in iig. 3. It will be observed that inthe device shown in g. 3 the bearing-point (or wedge) for the shank ofthe saw-tooth is .adjusted or changed -in relation to the die B uponwhich the point of the tooth is hammered or swaged, whereas with thedevice shown in fig. 1 the same object is attained by the adjustment ofthe die or swage-pin Bin relation to the bearing-point on th stock. Ineither ease, theadaptation of the swage to diiferent teeth, and tovariations therein, supplies a very important desideratum, and enablesthe instrument to be more-extensively and eiiiciently brought intor'equisii tion. The front of the swage-stock A is notched, as at a, andthese notches are designed to engage with corre-1 spending seri-ationson the shank of the saw-tooth, as shown', to prevent the tooth fromspringing back, and

thus retain its point upon the supporting-die B when subjected to thcblows of the hammer applied to the stamping-die C. The notches a mayeither extendentirely across the front or face of the stock A, or bemerely long enough to receive the serrations on thc saw-tooth. Thesupporting-de B,fig. 1, has an oval or convex face, as shown clearly infig. 2. so that when it is in the position shown in iig. 1, it has theeiect to spread the point of the tooth sideways when acted upon by C. By.reversing the position ofthe die, e., by withdrawing the same, turningit onequarter round and tje-inserting it,) itphas the effect to draw outthe point of the tooth endwise. The die B is held against turning, whenin either position, by its square shank, which projects down-A ward intothe opening F. The striking-die C is mounted in a spring-holder, Cl,adjustably attached to the stock by means of a set-screw, C2, andserving to keep the die `down to its work. The die C spreads the toothsome distance back from its cutting-edge, Aand thus causes it to makesmoother work in sawing.

Having thus described my invention, what I claimheren as neiv,'a.nddesire to secure by Letters Patent,`is-

1. The provision of'notehes or teeth, a, on theswage-stock, to hold thenotched or serrated saw-tooth against displacement, substantially asdeseiibed.

2. The adjustable swagepin or die B, or its described equivalent,whereby the swege is made to accommodate or adapt itself toirregularities or variationsin the saw-teeth, substantiallyas'rdescribed.

3. VA i'evelsiblesuppuiting-die or sWage-pin, B, having a. convex oroval face,y in order to either spread the tooth sideivays or draw thesaune endwnys, substantially as described.

4. The die or stamping-device C, in combination with the spring-holder Candadjusting-ser'eiv C2, substantizilly as and for the purpose setforth. I

To the above specification of my new and useful improvement in swagesfor saw-teeth,- I have signed my (hand, this 15th day'of July, A. D.1867. l l

NELSON JOHNSON.

Witnesses:

J; E.A M. BOWEN, OQTAVIUB KNIGHT.

